NS3000/iX Operations and Maintenance Reference Manual (36922-90042)

Chapter 5 71
Common Network Problems
Investigate the Link
If the problem is easily reproducible, and link level tracing was
inactive when the problem took place, turn on tracing using the
LINKCONTROL command. When the problem has been reproduced,
turn off trace and give this trace file to your Hewlett-Packard
representative for additional analysis. If a hardware failure takes
place while trace is active, give the files NMLG
xx .PUB.SYS and
NETDMP
nn .PUB.SYS to your HP representative as well.
The log message contains an error code, such as an NMERR.
Information on the cause and recovery of these errors can be found
in the NS 3000/iX Error Messages Reference Manual. Keep a copy of
the log file and the output. If you need to submit an CR, send the log
file and output to your Hewlett-Packard representative.
• If link level logging is not enabled, enable it through NMMGR so
that the information will be available if this problem can be
repeated.
NS Point-to-Point 3000/iX Link Problems
The NS Point-to-Point 3000/iX link (router link) is connected with a
programmable serial interface (PSI) card. For problems that involve the
PSI, use the following strategy where applicable:
• Issue the LINKCONTROL
linkname ; STATUS=DIAGSTATS command.
Inspect the output and attempt to identify the problem. Refer to
Appendix A , “LINKCONTROL Command,” for a detailed analysis of
the fields displayed. Retain a copy of the output from this command
for your Hewlett-Packard representative.
• Run PING to confirm whether or not the remote node is reachable.
See Chapter 6 , “Using NETTOOL,” for instructions on running
PING.
•IfPING fails, use PSIDAD. PSIDAD is an on-line diagnostic tool. It
verifies the PSI components by running the PSI self-test, then
extends the testing as far into the communications network as
possible, depending on which equipment is connected to the PSI.
Refer to the On-Line Diagnostic Subsystem Manual, Volume I, for
instructions.
• If a PSI failure has taken place, give the files NMLG
xx .PUB.SYS and
NETDMP
nn .PUB.SYS to your Hewlett-Packard representative for
additional analysis.
• If the problem is easily reproducible, and link level tracing was
inactive when the problem took place, turn on tracing using the
LINKCONTROL command. When the problem has been reproduced,
turn off tracing. Save both the raw trace file and the formatted
output for your Hewlett-Packard representative for analysis. It is
important to save any PSI dump file (NETDMP
nn .PUB.SYS) that is
created while link level tracing was enabled. Send both the PSI